During these times where they become Ultra Bitch, they will: consume random things and people, eyes will turn blood red, mouths will foam, talons will grow, show their hatred for man, and wreak havoc for the sake of 'they can' because it is considered an excuse. Women will scream, growl, snarl, bark and possibly devour you whole, and say "sorry I have PMS" afterwards.
CAUTION: Stay away from all women with PMS, if you hear a growl... run. Run as far as you can.
guy: "Oh God! She's infected!"
girl: *chases boy and eats him whole*
girl: "I'm f*^%ing sorry I have PMS"
The woman's "time of the month" when her uterus sheds its lining because her monthly egg isn't fertilized and dies.
The worst time to be around a woman, because she becomes an irrational psycho bitch which froths at the mouth with rage and seeks to destroy anything which stands in her way.
Since males don't have periods, they act like insensitive jackasses when the women around them are suffering from PMS. Those stuck-up dickless monkeys can't get any ass, so they call their girlfriends bitches and blow everything out of proportion. Sure, sometimes PMS can cause a girl to get a little bitchy, but those douchebags act like a PMSing woman is a nuclear bomb that's been unleashed on the city. All they think about is themselves, they don't even give a crap when their girl is crying out in pain because the girl is just "being a dramatic bitch".
A guy will accuse a girl of PMSing even if she gets mad at him for something that's his own fault, such as being a complete dickhole.
Bob: You bitch!! Why are you acting like a psycho?! You must be PMSing!!!
Sally: WTF are you talking about, you moron?
Bob: RUN AWAY SHE'S FOAMING AT THE MOUTH!!!!!! OH MY GOD SHE'S GONNA RIP MY LEGS OFF!!!!